How do you handle sulfur-sealed tanks and liquid discharge ports during startup and shutdown?
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After the unit is shut down, or at the beginning of operation, catalyst dust, sulfur accumulation, and carbon buildup can easily block the liquid flow discharge ports as well as the sulfur removal tank for liquid sulfur; they can also clog the bottom of the sulfur removal tank. How do you prevent this? Are there any effective measures?
First of all, it depends on the form of the sulfur seal. The regulations regarding wastewater discharge at the beginning of operations stated this years ago, but we basically no longer follow those rules these days, after more than a decade.
Use nitrogen to purge the flow seal, performing multiple purges in succession； After shutting down production, perform a flow seal inspection and clean the contaminants at the bottom.
When we shut down, we open the waste discharge outlet to clean it out; before starting up to introduce acidic gas, we ensure that the waste discharge outlet is unobstructed. The sulfur seal tank has not been inspected, but it has been functioning properly throughout. Will it need to be opened for inspection during the next major repair as well? But how can the sulfur be completely removed? The sulfur tank is nearly 4 meters tall and located below ground level.